require 'helper'
require 'flipper/adapters/memory'
require 'flipper/instrumentation/metriks'

RSpec.describe Flipper::Instrumentation::MetriksSubscriber do
  let(:adapter) do
    memory = Flipper::Adapters::Memory.new
    Flipper::Adapters::Instrumented.new(memory, instrumenter: ActiveSupport::Notifications)
  end
  let(:flipper) do
    Flipper.new(adapter, instrumenter: ActiveSupport::Notifications)
  end

  let(:user) { user = Struct.new(:flipper_id).new('1') }

  before do
    Metriks::Registry.default.clear
  end

  context 'for enabled feature' do
    it 'updates feature metrics when calls happen' do
      flipper[:stats].enable(user)
      expect(Metriks.timer('flipper.feature_operation.enable').count).to be(1)

      flipper[:stats].enabled?(user)
      expect(Metriks.timer('flipper.feature_operation.enabled').count).to be(1)
      expect(Metriks.meter('flipper.feature.stats.enabled').count).to be(1)
    end
  end

  context 'for disabled feature' do
    it 'updates feature metrics when calls happen' do
      flipper[:stats].disable(user)
      expect(Metriks.timer('flipper.feature_operation.disable').count).to be(1)

      flipper[:stats].enabled?(user)
      expect(Metriks.timer('flipper.feature_operation.enabled').count).to be(1)
      expect(Metriks.meter('flipper.feature.stats.disabled').count).to be(1)
    end
  end

  it 'updates adapter metrics when calls happen' do
    flipper[:stats].enable(user)
    expect(Metriks.timer('flipper.adapter.memory.enable').count).to be(1)

    flipper[:stats].enabled?(user)
    expect(Metriks.timer('flipper.adapter.memory.get').count).to be(1)

    flipper[:stats].disable(user)
    expect(Metriks.timer('flipper.adapter.memory.disable').count).to be(1)
  end
end